【英文标准名称】:Measurementoffluidflowbymeansofpressuredifferentialdevicesinsertedincircularcross-sectionconduitsrunningfull.Venturitubes
【原文标准名称】:用插入圆截面管道中的压差装置测量流体流量.文氏管
【标准号】:BSENISO5167-4-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-03-18
【实施或试行日期】:2003-03-18
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:定义(术语);隔膜;差动装置;尺寸规格;流动;流量计算;流量计量;流量测量;流量;数学计算;测量;安装;喷嘴;节流孔板;管道;规范(验收);管;文杜利管
【英文主题词】:Definitions;Diaphragms;Differentialdevices;Dimensions;Flow;Flowcalculation;Flowmeasurement;Flowmeasurements;Fluids;Mathematicalcalculations;Measurement;Mounting;Nozzles;Orificeplates;Pipelines;Specification(approval);Tubes;Venturitubes
【摘要】:ThispartofISO5167specifiesthegeometryandmethodofuse(installationandoperatingconditions)ofVenturitubeswhentheyareinsertedinaconduitrunningfulltodeterminetheflowrateofthefluidflowingintheconduit.ThispartofISO5167alsoprovidesbackgroundinformationforcalculatingtheflowrateandisapplicableinconjunctionwiththerequirementsgiveninISO5167-1.ThispartofISO5167isapplicableonlytoVenturitubesinwhichtheflowremainssubsonicthroughoutthemeasuringsectionandwherethefluidcanbeconsideredassingle-phase.Inaddition,eachofthesedevicescanonlybeusedwithinspecifiedlimitsofpipesize,roughness,diameterratioandReynoldsnumber.ThispartofISO5167isnotapplicabletothemeasurementofpulsatingflow.ItdoesnotcovertheuseofVenturitubesinpipessizedlessthan50mmormorethan1200mm,orwherethepipeReynoldsnumbersarebelow2×105.ThispartofISO5167dealswiththethreetypesofclassicalVenturitubes:a)cast;b)machined;c)roughweldedsheet-iron.AVenturitubeisadevicewhichconsistsofaconvergentinletconnectedtoacylindricalthroatwhichisinturnconnectedtoaconicalexpandingsectioncalledthe“divergent”.ThedifferencesbetweenthevaluesoftheuncertaintyofthedischargecoefficientforthethreetypesofclassicalVenturitubeshow,ontheonehand,thenumberofresultsavailableforeachtypeofclassicalVenturitubeand,ontheotherhand,themoreorlessprecisedefinitionofthegeometricprofile.Thevaluesarebasedondatacollectedmanyyearsago.Venturinozzles(andothernozzles)aredealtwithinISO5167-3.
【中国标准分类号】:A42
【国际标准分类号】:17_120_10
【页数】:36P.;A4
【正文语种】:英语